Ulam Spiral Definition
o͝oläm
noun
A graphical representation of the natural numbers in a spiral formation, showing that the prime numbers, when highlighted, tend to fall in clusters and diagonal lines.
American Heritage
Origin of Ulam Spiral
After Stanislaw Marcin Ulam (1909–1984), Polish-born American mathematician who discovered it
From American Heritage Dictionary of the English Language, 5th Edition
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